One page Seo optimisation of a wix made website

I have a website which is made on wix platform, this needs to be optimised as per standard seo practices mentioned by google, I am looking for someone who can check for this, and make it foolproof like alt text on images, speed score, font, footer site links, etc. Its a small 15 to 20 page static website. If you have working experience on Wix platform, then only apply please.